I have just connected the spdif output from my Sound blaster live to my Sony str-de475 AV reciever. the dolby digital signal is getting decoded by the reciever but is sounding choppy. i have also connected it to my other sony amp Str-db1080 and still it is choppy. I am using powerdvd 4.0 as my dvd player and when the sound is output from 2 channel analogue it sounds fine. please can anybody help.